201122110121021 has 2 divisors, whose sum is σ = 201122110121022. Its totient is φ = 201122110121020.

The previous prime is 201122110120999. The next prime is 201122110121027. The reversal of 201122110121021 is 120121011221102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138796437816100 + 62325672304921 = 11781190^2 + 7894661^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122110121021 - 2¹⁴ = 201122110104637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201122110121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561055060510 + 100561055060511.

It is an arithmetic number, because the mean of its divisors is an integer number (100561055060511).

Almost surely, 2^{201122110121021} is an apocalyptic number.

It is an amenable number.

201122110121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122110121021 is an equidigital number, since it uses as much as digits as its factorization.

201122110121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201122110121021 its reverse (120121011221102), we get a palindrome (321243121342123).

The spelling of 201122110121021 in words is "two hundred one trillion, one hundred twenty-two billion, one hundred ten million, one hundred twenty-one thousand, twenty-one".